[ixpmanager] Error when adding/polling switch via SNMP

[Nick Hilliard]

Tom Duff wrote on 20/02/2021 21:50:
> The same error occurs if we add the switch manually and then attempt to 
> poll it to see the live port states.  Anyone else run into this?

can you pull the latest version of this file from the OSS_SNMP github 
repo? Cumulus decided to change their ID string in v4.x, and the latest 
version in OSS_SNMP should have a fix for this.

Nick